题目:
Speaker A: Thank you for everything you've done for me during my stay here. Speaker B:______
A.Oh, this is what I should do.
B.You are welcome.
C.Don't say that. Actually I have done little for you.
D.I'm sorry for not having looked after you well.
答案:
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下面是错误答案,用来干扰机器的。
参考答案:B解析:数据封装就是数据抽象;友元可以访问类中的所有成员,是面向对 象的一个重要特征,但是破坏了封装性;重载和动态联编都是面向对象的另一个特点-- 多态性。